From 14875cb5d2afea4db3457242eecd61f896cfd363 Mon Sep 17 00:00:00 2001 From: LoveIsGrief Date: Sat, 27 Jul 2019 21:59:34 +0200 Subject: [PATCH] Import pr0cks for local modifications #1 - Forward using iptables, pr0xy and custom DNS --- .gitmodules | 3 - contained/pr0cks/.gitignore | 57 ++ contained/pr0cks/LICENSE | 674 ++++++++++++++++++++++++ contained/pr0cks/README.md | 61 +++ contained/pr0cks/iptables_example.rules | 19 + contained/pr0cks/pr0cks.py | 294 +++++++++++ contained/pr0cks/socks.py | 383 ++++++++++++++ 7 files changed, 1488 insertions(+), 3 deletions(-) delete mode 100644 .gitmodules create mode 100644 contained/pr0cks/.gitignore create mode 100644 contained/pr0cks/LICENSE create mode 100644 contained/pr0cks/README.md create mode 100644 contained/pr0cks/iptables_example.rules create mode 100755 contained/pr0cks/pr0cks.py create mode 100644 contained/pr0cks/socks.py diff --git a/.gitmodules b/.gitmodules deleted file mode 100644 index f10eebf..0000000 --- a/.gitmodules +++ /dev/null @@ -1,3 +0,0 @@ -[submodule "pr0cks"] - path = contained/pr0cks - url = https://github.com/LoveIsGrief/pr0cks.git diff --git a/contained/pr0cks/.gitignore b/contained/pr0cks/.gitignore new file mode 100644 index 0000000..ba74660 --- /dev/null +++ b/contained/pr0cks/.gitignore @@ -0,0 +1,57 @@ +# Byte-compiled / optimized / DLL files +__pycache__/ +*.py[cod] + +# C extensions +*.so + +# Distribution / packaging +.Python +env/ +build/ +develop-eggs/ +dist/ +downloads/ +eggs/ +.eggs/ +lib/ +lib64/ +parts/ +sdist/ +var/ +*.egg-info/ +.installed.cfg +*.egg + +# PyInstaller +# Usually these files are written by a python script from a template +# before PyInstaller builds the exe, so as to inject date/other infos into it. +*.manifest +*.spec + +# Installer logs +pip-log.txt +pip-delete-this-directory.txt + +# Unit test / coverage reports +htmlcov/ +.tox/ +.coverage +.coverage.* +.cache +nosetests.xml +coverage.xml +*,cover + +# Translations +*.mo +*.pot + +# Django stuff: +*.log + +# Sphinx documentation +docs/_build/ + +# PyBuilder +target/ diff --git a/contained/pr0cks/LICENSE b/contained/pr0cks/LICENSE new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/contained/pr0cks/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/contained/pr0cks/README.md b/contained/pr0cks/README.md new file mode 100644 index 0000000..aecf5e0 --- /dev/null +++ b/contained/pr0cks/README.md @@ -0,0 +1,61 @@ +# pr0cks +python script to transparently forward all TCP and DNS traffic through a socks (like ssh -D option) or HTTPS (CONNECT) proxy using iptables -j REDIRECT target. Only works on linux for now. + +## Features : +- set up a local transparent proxy compatible with socks4 socks5 and HTTP CONNECT proxies allowing to forward any TCP traffic transparently using iptables +- set up a local transparent DNS proxy translating UDP port 53 requests to TCP allowing DNS traffic to go through a proxy without UDP support (like ssh -D option) +- DNS caching mechanism to speed up the DNS resolutions through pr0cks + +# Usage example: let's rock +As an example we will use the socks5 proxy of openssh (the option -D) +```bash +$ ssh -D 1080 user@sshserver +``` +then you can add some iptables rules : +```bash +$ iptables -t nat -A OUTPUT ! -d /32 -o eth0 -p tcp -m tcp -j REDIRECT --to-ports 10080 +$ iptables -t nat -A OUTPUT -o eth0 -p udp -m udp --dport 53 -j REDIRECT --to-ports 1053 +``` +then start pr0cks : +```bash +$ python pr0cks.py --proxy SOCKS5:127.0.0.1:1080 +``` +All your TCP traffic and DNS traffic should now pass through the ssh server kinda like if you had setup a tun VPN through ssh but without admin rights on the server ! +#help +```text +python pr0cks.py -h +usage: procks [-h] [--proxy PROXY] [-p PORT] [-v] [--username USERNAME] + [--password PASSWORD] [--dns-port DNS_PORT] + [--dns-server DNS_SERVER] + +Transparent SOCKS5/SOCKS4/HTTP_CONNECT Proxy + +optional arguments: + -h, --help show this help message and exit + --proxy PROXY proxytype:ip:port to forward our connections through. + proxytype can be SOCKS5, SOCKS4 or HTTP + -p PORT, --port PORT port to bind the transparent proxy on the local socket + (default 10080) + -v, --verbose print all the connections requested through the proxy + --username USERNAME Username to authenticate with to the server. The + default is no authentication. + --password PASSWORD Only relevant when a username has been provided + --dns-port DNS_PORT dns port to listen on (default 1053) + --dns-server DNS_SERVER + ip:port of the DNS server to forward all DNS requests + to using TCP through the proxy (default + 208.67.222.222:53) +``` + +# Dependencies +- dnslib (https://pypi.python.org/pypi/dnslib) for DNS UDP to TCP translation support +- tested with Python 2.7 + +# TODO +- support UDP (with socks5) +- support proxy chaining + + +Don't hesitate to send me your feedback or any issue you may find + +I hope it will be useful to someone ! Have fun :) diff --git a/contained/pr0cks/iptables_example.rules b/contained/pr0cks/iptables_example.rules new file mode 100644 index 0000000..65d621a --- /dev/null +++ b/contained/pr0cks/iptables_example.rules @@ -0,0 +1,19 @@ +*nat +:PREROUTING ACCEPT [0:0] +:INPUT ACCEPT [0:0] +:OUTPUT ACCEPT [0:0] +:POSTROUTING ACCEPT [0:0] +-A OUTPUT -o lo -j ACCEPT +-A OUTPUT ! -d /32 -o eth0 -p tcp -m tcp -j REDIRECT --to-ports 10080 +-A OUTPUT -o eth0 -p udp -m udp --dport 53 -j REDIRECT --to-ports 1053 +COMMIT + +*filter +:INPUT ACCEPT [0:0] +:FORWARD ACCEPT [0:0] +:OUTPUT DROP [0:0] +-A OUTPUT -o lo -j ACCEPT +-A OUTPUT -o eth0 -p tcp -d 127.0.0.1/32 -j ACCEPT +-A OUTPUT -o eth0 -p tcp -d /32 -j ACCEPT +-A OUTPUT -o eth0 -d 127.0.0.1/32 -p udp -m udp --dport 1053 -j ACCEPT +COMMIT diff --git a/contained/pr0cks/pr0cks.py b/contained/pr0cks/pr0cks.py new file mode 100755 index 0000000..743b392 --- /dev/null +++ b/contained/pr0cks/pr0cks.py @@ -0,0 +1,294 @@ +# Author: Nicolas VERDIER (contact@n1nj4.eu) +# This file is part of pr0cks. +# +# pr0cks is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# pr0cks is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with pr0cks. If not, see . + +import sys +from io import StringIO +import time +import struct +import os +import asyncore +import socket +import socks +import argparse +import traceback +import logging +logging.basicConfig(stream=sys.stderr, level=logging.WARNING) +import binascii +from collections import OrderedDict + +dnslib_imported=False +dns_cache=OrderedDict() +DNS_CACHE_SIZE=1000 + +def display(msg): + msg=msg.strip() + if msg.startswith("[-]"): + print("\033[31m[-]\033[0m"+msg[3:]) + elif msg.startswith("[+]"): + print("\033[32m[+]\033[0m"+msg[3:]) + elif msg.startswith("[i]"): + print("\033[1;30m[i]\033[0m"+msg[3:]) + else: + print(msg) + +try: + from dnslib import DNSRecord, QTYPE + from dnslib.server import DNSServer,DNSHandler,BaseResolver,DNSLogger + class ProxyResolver(BaseResolver): + def __init__(self,address,port): + self.address = address + self.port = port + + def resolve(self,request,handler): + if handler.protocol == 'udp': + proxy_r = request.send(self.address,self.port) + else: + proxy_r = request.send(self.address,self.port,tcp=True) + reply = DNSRecord.parse(proxy_r) + return reply + + class PassthroughDNSHandler(DNSHandler): + def get_reply(self,data): + global dns_cache + global args + host,port = self.server.resolver.address,self.server.resolver.port + request = DNSRecord.parse(data) + + + domain=str(request.q.qname) + qtype=str(QTYPE.get(request.q.qtype)) + index=domain+"/"+qtype + if not args.no_cache and index in dns_cache: + if time.time()DNS_CACHE_SIZE: + dns_cache.popitem(last=False) + return response + + def send_tcp(data,host,port): + """ + Helper function to send/receive DNS TCP request + (in/out packets will have prepended TCP length header) + """ + sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM) + sock.settimeout(5) + sock.connect((host,port)) + sock.sendall(data) + response = sock.recv(8192) + length = struct.unpack("!H",bytes(response[:2]))[0] + while len(response) - 2 < length: + response += sock.recv(8192) + sock.close() + return response + dnslib_imported=True +except ImportError: + display("[-] WARNING: The following dependency is needed to proxify DNS through tcp: pip install dnslib") + + +#Python socket module does not have this constant +SO_ORIGINAL_DST = 80 +class Socks5Conn(asyncore.dispatcher): + def __init__(self, sock=None, map=None, conn=True, verbose=False): + self.out_buffer=b"" + self.verbose=verbose + self.allsent=False + if conn is True: + #get the original dst address and port + odestdata = sock.getsockopt(socket.SOL_IP, SO_ORIGINAL_DST, 16) + _, port, a1, a2, a3, a4 = struct.unpack("!HHBBBBxxxxxxxx", odestdata) + address = "%d.%d.%d.%d" % (a1, a2, a3, a4) + if self.verbose: + display('[+] Forwarding incoming connection from %s to %s through the proxy' % (repr(sock.getpeername()), (address, port))) + #connect to the original dst : + self.conn_sock = socks.socksocket() + #self.conn_sock.settimeout(15) + self.conn_sock.connect((address, port)) + + self.sock_class=Socks5Conn(sock=self.conn_sock, conn=self) #add a dispatcher to handle the other side + else: + self.sock_class=conn + self.conn_sock=None + asyncore.dispatcher.__init__(self, sock, map) + + def initiate_send(self): + num_sent = 0 + num_sent = asyncore.dispatcher.send(self, self.out_buffer[:4096]) + self.out_buffer = self.out_buffer[num_sent:] + + def handle_write(self): + self.initiate_send() + + def writable(self): + return (self.allsent or len(self.out_buffer)>0) + + def send(self, data): + #if self.debug: + # self.log_info('sending %s' % repr(data)) + if data: + self.out_buffer += data + else: + self.allsent=True + #self.initiate_send() + + def handle_read(self): + data = self.recv(8192) + self.sock_class.send(data) + + def handle_close(self): + leftover_size=len(self.sock_class.out_buffer) + while leftover_size>0 : + logging.debug("sending %s leftover data"%leftover_size) + self.sock_class.initiate_send() + leftover_size=len(self.sock_class.out_buffer) + + self.sock_class.close() + self.close() + + def handle_error(self): + t, v, tb = sys.exc_info() + display("[-] Socks5conn Error: %s : %s\n%s"%(t,v, tb)) + + + +class Pr0cks5Server(asyncore.dispatcher): + verbose=False + def __init__(self, host, port): + asyncore.dispatcher.__init__(self) + self.create_socket(socket.AF_INET, socket.SOCK_STREAM) + self.set_reuse_addr() + self.bind((host, port)) + self.listen(20) + + def handle_accept(self): + pair = self.accept() + if pair is not None: + sock, addr = pair + self.sock=sock + handler = Socks5Conn(sock, verbose=self.verbose) + def handle_close(self): + self.sock.close() + self.close() + def handle_error(self): + t, v, tb = sys.exc_info() + display("[-] %s : %s"%(t,v)) + + + +args=None +if __name__=='__main__': + parser = argparse.ArgumentParser(prog='procks', description="Transparent SOCKS5/SOCKS4/HTTP_CONNECT Proxy") + parser.add_argument('--proxy', default="SOCKS5:127.0.0.1:1080", help="proxytype:ip:port to forward our connections through. proxytype can be SOCKS5, SOCKS4 or HTTP") + parser.add_argument('-p', '--port', type=int, default=10080, help="port to bind the transparent proxy on the local socket (default 10080)") + parser.add_argument('-n', '--nat', action='store_true', help="set bind address to 0.0.0.0 to make pr0cks work from a netfilter FORWARD rule instead of OUTPUT") + parser.add_argument('-v', '--verbose', action="store_true", help="print all the connections requested through the proxy") + parser.add_argument('-c', '--no-cache', action="store_true", help="don't cache dns requests") + parser.add_argument('--username', default=None, help="Username to authenticate with to the server. The default is no authentication.") + parser.add_argument('--password', default=None, help="Only relevant when a username has been provided") + parser.add_argument('--dns-port', default=1053, type=int, help="dns port to listen on (default 1053)") + parser.add_argument('--dns-server', default="8.8.8.8:53", help="ip:port of the DNS server to forward all DNS requests to using TCP through the proxy (default 8.8.8.8:53)")#208.67.222.222:53 + args=parser.parse_args() + + bind_address="127.0.0.1" + if args.nat: + bind_address="0.0.0.0" + if dnslib_imported: + try: + dns_srv, dns_port=args.dns_server.split(':',1) + dns_port=int(dns_port) + except Exception as e: + display("[-] %s"%e) + display("[-] Invalid dns server : %s"%args.dns_server) + exit(1) + resolver = ProxyResolver(dns_srv,dns_port) + handler = PassthroughDNSHandler # if args.passthrough else DNSHandler + logger = DNSLogger("request,reply,truncated,error", False) + udp_server = DNSServer(resolver, + port=args.dns_port, + address=bind_address, + logger=logger, + handler=handler) + udp_server.start_thread() + display("[+] DNS server started on %s:%s forwarding all DNS trafic to %s:%s using TCP"%(bind_address, args.dns_port, dns_srv, dns_port)) + + ptype,proxy_addr,proxy_port=args.proxy.split(":",2) + t=None + if ptype.upper()=="SOCKS5": + t=socks.PROXY_TYPE_SOCKS5 + elif ptype.upper()=="SOCKS4": + t=socks.PROXY_TYPE_SOCKS4 + elif ptype.upper()=="HTTP": + t=socks.PROXY_TYPE_HTTP + else: + display("[-] --proxy : unknown proxy type %s"%ptype) + exit(1) + try: + proxy_port=int(proxy_port) + except Exception: + display("[-] --proxy : invalid port %s"%proxy_port) + exit(1) + + if args.username: + if not args.password: + exit("username provided but without password !") + display("[+] Provided credentials are %s:%s"%(args.username, args.password[0:3]+"*"*(len(args.password)-3))) + socks.setdefaultproxy(proxytype=t, addr=proxy_addr, port=proxy_port, username=args.username, password=args.password) + + display("[+] Forwarding all TCP traffic received on %s:%s through the %s proxy on %s:%s"%(bind_address, args.port, ptype, proxy_addr, proxy_port)) + display("[i] example of rule you need to have:") + display("iptables -t nat -A OUTPUT -o eth0 -p tcp -m tcp !-d -j REDIRECT --to-ports %s"%args.port) + display("iptables -t nat -A OUTPUT -o eth0 -p udp -m udp --dport 53 -j REDIRECT --to-ports %s"%args.dns_port) + display("[i] Tip to avoid leaks : Block IPv6. For ipv4 put a DROP policy on OUTPUT and only allow TCP to your socks proxy. cf. the iptables.rules example file") + + + try: + server = Pr0cks5Server(bind_address, args.port) + if args.verbose: + server.verbose=True + asyncore.loop() + except KeyboardInterrupt: + sys.stdout.write("\n") + sys.exit(0) + except Exception as e: + sys.stderr.write(traceback.format_exc()) + sys.exit(1) + diff --git a/contained/pr0cks/socks.py b/contained/pr0cks/socks.py new file mode 100644 index 0000000..79c4586 --- /dev/null +++ b/contained/pr0cks/socks.py @@ -0,0 +1,383 @@ +"""SocksiPy - Python SOCKS module. +Version 1.00 + +Copyright 2006 Dan-Haim. All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, +are permitted provided that the following conditions are met: +1. Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. +2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. +3. Neither the name of Dan Haim nor the names of his contributors may be used + to endorse or promote products derived from this software without specific + prior written permission. + +THIS SOFTWARE IS PROVIDED BY DAN HAIM "AS IS" AND ANY EXPRESS OR IMPLIED +WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO +EVENT SHALL DAN HAIM OR HIS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA +OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT +OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMANGE. + + +This module provides a standard socket-like interface for Python +for tunneling connections through SOCKS proxies. + +""" + +""" + +Minor modifications made by Christopher Gilbert (http://motomastyle.com/) +for use in PyLoris (http://pyloris.sourceforge.net/) + +Minor modifications made by Mario Vilas (http://breakingcode.wordpress.com/) +mainly to merge bug fixes found in Sourceforge + +""" + +import socket +import struct +import sys + +PROXY_TYPE_SOCKS4 = 1 +PROXY_TYPE_SOCKS5 = 2 +PROXY_TYPE_HTTP = 3 + +_defaultproxy = None +_orgsocket = socket.socket + +class ProxyError(Exception): pass +class GeneralProxyError(ProxyError): pass +class Socks5AuthError(ProxyError): pass +class Socks5Error(ProxyError): pass +class Socks4Error(ProxyError): pass +class HTTPError(ProxyError): pass + +_generalerrors = ("success", + "invalid data", + "not connected", + "not available", + "bad proxy type", + "bad input") + +_socks5errors = ("succeeded", + "general SOCKS server failure", + "connection not allowed by ruleset", + "Network unreachable", + "Host unreachable", + "Connection refused", + "TTL expired", + "Command not supported", + "Address type not supported", + "Unknown error") + +_socks5autherrors = ("succeeded", + "authentication is required", + "all offered authentication methods were rejected", + "unknown username or invalid password", + "unknown error") + +_socks4errors = ("request granted", + "request rejected or failed", + "request rejected because SOCKS server cannot connect to identd on the client", + "request rejected because the client program and identd report different user-ids", + "unknown error") + +def setdefaultproxy(proxytype=None, addr=None, port=None, rdns=True, username=None, password=None): + """setdefaultproxy(proxytype, addr[, port[, rdns[, username[, password]]]]) + Sets a default proxy which all further socksocket objects will use, + unless explicitly changed. + """ + global _defaultproxy + _defaultproxy = (proxytype, addr, port, rdns, username, password) + +def wrapmodule(module): + """wrapmodule(module) + Attempts to replace a module's socket library with a SOCKS socket. Must set + a default proxy using setdefaultproxy(...) first. + This will only work on modules that import socket directly into the namespace; + most of the Python Standard Library falls into this category. + """ + if _defaultproxy != None: + module.socket.socket = socksocket + else: + raise GeneralProxyError((4, "no proxy specified")) + +class socksocket(socket.socket): + """socksocket([family[, type[, proto]]]) -> socket object + Open a SOCKS enabled socket. The parameters are the same as + those of the standard socket init. In order for SOCKS to work, + you must specify family=AF_INET, type=SOCK_STREAM and proto=0. + """ + + def __init__(self, family=socket.AF_INET, type=socket.SOCK_STREAM, proto=0, _sock=None): + _orgsocket.__init__(self, family, type, proto, _sock) + if _defaultproxy != None: + self.__proxy = _defaultproxy + else: + self.__proxy = (None, None, None, None, None, None) + self.__proxysockname = None + self.__proxypeername = None + + def __recvall(self, count): + """__recvall(count) -> data + Receive EXACTLY the number of bytes requested from the socket. + Blocks until the required number of bytes have been received. + """ + data = self.recv(count) + while len(data) < count: + d = self.recv(count-len(data)) + if not d: raise GeneralProxyError((0, "connection closed unexpectedly")) + data = data + d + return data + + def setproxy(self, proxytype=None, addr=None, port=None, rdns=True, username=None, password=None): + """setproxy(proxytype, addr[, port[, rdns[, username[, password]]]]) + Sets the proxy to be used. + proxytype - The type of the proxy to be used. Three types + are supported: PROXY_TYPE_SOCKS4 (including socks4a), + PROXY_TYPE_SOCKS5 and PROXY_TYPE_HTTP + addr - The address of the server (IP or DNS). + port - The port of the server. Defaults to 1080 for SOCKS + servers and 8080 for HTTP proxy servers. + rdns - Should DNS queries be preformed on the remote side + (rather than the local side). The default is True. + Note: This has no effect with SOCKS4 servers. + username - Username to authenticate with to the server. + The default is no authentication. + password - Password to authenticate with to the server. + Only relevant when username is also provided. + """ + self.__proxy = (proxytype, addr, port, rdns, username, password) + + def __negotiatesocks5(self, destaddr, destport): + """__negotiatesocks5(self,destaddr,destport) + Negotiates a connection through a SOCKS5 server. + """ + # First we'll send the authentication packages we support. + if (self.__proxy[4]!=None) and (self.__proxy[5]!=None): + # The username/password details were supplied to the + # setproxy method so we support the USERNAME/PASSWORD + # authentication (in addition to the standard none). + self.sendall(struct.pack('BBBB', 0x05, 0x02, 0x00, 0x02)) + else: + # No username/password were entered, therefore we + # only support connections with no authentication. + self.sendall(struct.pack('BBB', 0x05, 0x01, 0x00)) + # We'll receive the server's response to determine which + # method was selected + chosenauth = self.__recvall(2) + if chosenauth[0:1] != chr(0x05).encode(): + self.close() + raise GeneralProxyError((1, _generalerrors[1])) + # Check the chosen authentication method + if chosenauth[1:2] == chr(0x00).encode(): + # No authentication is required + pass + elif chosenauth[1:2] == chr(0x02).encode(): + # Okay, we need to perform a basic username/password + # authentication. + self.sendall(chr(0x01).encode() + chr(len(self.__proxy[4])) + self.__proxy[4] + chr(len(self.__proxy[5])) + self.__proxy[5]) + authstat = self.__recvall(2) + if authstat[0:1] != chr(0x01).encode(): + # Bad response + self.close() + raise GeneralProxyError((1, _generalerrors[1])) + if authstat[1:2] != chr(0x00).encode(): + # Authentication failed + self.close() + raise Socks5AuthError((3, _socks5autherrors[3])) + # Authentication succeeded + else: + # Reaching here is always bad + self.close() + if chosenauth[1] == chr(0xFF).encode(): + raise Socks5AuthError((2, _socks5autherrors[2])) + else: + raise GeneralProxyError((1, _generalerrors[1])) + # Now we can request the actual connection + req = struct.pack('BBB', 0x05, 0x01, 0x00) + # If the given destination address is an IP address, we'll + # use the IPv4 address request even if remote resolving was specified. + try: + ipaddr = socket.inet_aton(destaddr) + req = req + chr(0x01).encode() + ipaddr + except socket.error: + # Well it's not an IP number, so it's probably a DNS name. + if self.__proxy[3]: + # Resolve remotely + ipaddr = None + req = req + chr(0x03).encode() + chr(len(destaddr)).encode() + destaddr + else: + # Resolve locally + ipaddr = socket.inet_aton(socket.gethostbyname(destaddr)) + req = req + chr(0x01).encode() + ipaddr + req = req + struct.pack(">H", destport) + self.sendall(req) + # Get the response + resp = self.__recvall(4) + if resp[0:1] != chr(0x05).encode(): + self.close() + raise GeneralProxyError((1, _generalerrors[1])) + elif resp[1:2] != chr(0x00).encode(): + # Connection failed + self.close() + if ord(resp[1:2])<=8: + raise Socks5Error((ord(resp[1:2]), _socks5errors[ord(resp[1:2])])) + else: + raise Socks5Error((9, _socks5errors[9])) + # Get the bound address/port + elif resp[3:4] == chr(0x01).encode(): + boundaddr = self.__recvall(4) + elif resp[3:4] == chr(0x03).encode(): + resp = resp + self.recv(1) + boundaddr = self.__recvall(ord(resp[4:5])) + else: + self.close() + raise GeneralProxyError((1,_generalerrors[1])) + boundport = struct.unpack(">H", self.__recvall(2))[0] + self.__proxysockname = (boundaddr, boundport) + if ipaddr != None: + self.__proxypeername = (socket.inet_ntoa(ipaddr), destport) + else: + self.__proxypeername = (destaddr, destport) + + def getproxysockname(self): + """getsockname() -> address info + Returns the bound IP address and port number at the proxy. + """ + return self.__proxysockname + + def getproxypeername(self): + """getproxypeername() -> address info + Returns the IP and port number of the proxy. + """ + return _orgsocket.getpeername(self) + + def getpeername(self): + """getpeername() -> address info + Returns the IP address and port number of the destination + machine (note: getproxypeername returns the proxy) + """ + return self.__proxypeername + + def __negotiatesocks4(self,destaddr,destport): + """__negotiatesocks4(self,destaddr,destport) + Negotiates a connection through a SOCKS4 server. + """ + # Check if the destination address provided is an IP address + rmtrslv = False + try: + ipaddr = socket.inet_aton(destaddr) + except socket.error: + # It's a DNS name. Check where it should be resolved. + if self.__proxy[3]: + ipaddr = struct.pack("BBBB", 0x00, 0x00, 0x00, 0x01) + rmtrslv = True + else: + ipaddr = socket.inet_aton(socket.gethostbyname(destaddr)) + # Construct the request packet + req = struct.pack(">BBH", 0x04, 0x01, destport) + ipaddr + # The username parameter is considered userid for SOCKS4 + if self.__proxy[4] != None: + req = req + self.__proxy[4] + req = req + chr(0x00).encode() + # DNS name if remote resolving is required + # NOTE: This is actually an extension to the SOCKS4 protocol + # called SOCKS4A and may not be supported in all cases. + if rmtrslv: + req = req + destaddr + chr(0x00).encode() + self.sendall(req) + # Get the response from the server + resp = self.__recvall(8) + if resp[0:1] != chr(0x00).encode(): + # Bad data + self.close() + raise GeneralProxyError((1,_generalerrors[1])) + if resp[1:2] != chr(0x5A).encode(): + # Server returned an error + self.close() + if ord(resp[1:2]) in (91, 92, 93): + self.close() + raise Socks4Error((ord(resp[1:2]), _socks4errors[ord(resp[1:2]) - 90])) + else: + raise Socks4Error((94, _socks4errors[4])) + # Get the bound address/port + self.__proxysockname = (socket.inet_ntoa(resp[4:]), struct.unpack(">H", resp[2:4])[0]) + if rmtrslv != None: + self.__proxypeername = (socket.inet_ntoa(ipaddr), destport) + else: + self.__proxypeername = (destaddr, destport) + + def __negotiatehttp(self, destaddr, destport): + """__negotiatehttp(self,destaddr,destport) + Negotiates a connection through an HTTP server. + """ + # If we need to resolve locally, we do this now + if not self.__proxy[3]: + addr = socket.gethostbyname(destaddr) + else: + addr = destaddr + self.sendall(("CONNECT " + addr + ":" + str(destport) + " HTTP/1.1\r\n" + "Host: " + destaddr + "\r\n\r\n").encode()) + # We read the response until we get the string "\r\n\r\n" + resp = self.recv(1) + while resp.find("\r\n\r\n".encode()) == -1: + resp = resp + self.recv(1) + # We just need the first line to check if the connection + # was successful + statusline = resp.splitlines()[0].split(" ".encode(), 2) + if statusline[0] not in ("HTTP/1.0".encode(), "HTTP/1.1".encode()): + self.close() + raise GeneralProxyError((1, _generalerrors[1])) + try: + statuscode = int(statusline[1]) + except ValueError: + self.close() + raise GeneralProxyError((1, _generalerrors[1])) + if statuscode != 200: + self.close() + raise HTTPError((statuscode, statusline[2])) + self.__proxysockname = ("0.0.0.0", 0) + self.__proxypeername = (addr, destport) + + def connect(self, destpair): + """connect(self, despair) + Connects to the specified destination through a proxy. + destpar - A tuple of the IP/DNS address and the port number. + (identical to socket's connect). + To select the proxy server use setproxy(). + """ + # Do a minimal input check first + if (not type(destpair) in (list,tuple)) or (len(destpair) < 2) or (type(destpair[0]) != type('')) or (type(destpair[1]) != int): + raise GeneralProxyError((5, _generalerrors[5])) + if self.__proxy[0] == PROXY_TYPE_SOCKS5: + if self.__proxy[2] != None: + portnum = self.__proxy[2] + else: + portnum = 1080 + _orgsocket.connect(self, (self.__proxy[1], portnum)) + self.__negotiatesocks5(destpair[0], destpair[1]) + elif self.__proxy[0] == PROXY_TYPE_SOCKS4: + if self.__proxy[2] != None: + portnum = self.__proxy[2] + else: + portnum = 1080 + _orgsocket.connect(self,(self.__proxy[1], portnum)) + self.__negotiatesocks4(destpair[0], destpair[1]) + elif self.__proxy[0] == PROXY_TYPE_HTTP: + if self.__proxy[2] != None: + portnum = self.__proxy[2] + else: + portnum = 8080 + _orgsocket.connect(self,(self.__proxy[1], portnum)) + self.__negotiatehttp(destpair[0], destpair[1]) + elif self.__proxy[0] == None: + _orgsocket.connect(self, (destpair[0], destpair[1])) + else: + raise GeneralProxyError((4, _generalerrors[4])) +